Digi XBee Cellular LTE Cat 1 User Manual page 15

Getting started with the XBee Cellular Modem Development Kit
Number Item
2 Self power module
3 Current testing
4 Loopback jumper
5 DC barrel plug: 6-20 V Greater than 500 mA loads require a DC supply for correct
6 LED indicator
7 USB
8 RSSI indicator
9 User buttons
10 Reset button
11 SPI power
12 SPI
13 Indicator LEDs
14 Through-hole XBee
sockets
15 20-pin header
1
Powering the board with J2 and J5 without R31 removed can cause shorts if the USB or barrel plug power are
connected. Applying too high a voltage destroys electronic circuitry in the device and other board components
and/or can cause injury.
Digi XBee Cellular LTE Cat 1 Embedded Modem User Guide
Description
Advanced users only—voids the warranty. Depopulate R31 to
power the device using V+ and GND from J2 and J5. You can
connect sense lines to S+ and S- for sensing power supplies.
CAUTION: Voltage is not regulated. Applying the incorrect
voltage can cause fire and serious injury.
Depopulating R31 allows a current probe to be inserted across P6
terminals. The current though P6/R31 powers the device only.
Other supporting circuitry is powered by a different trace.
Populating P8 with a loopback jumper causes serial transmissions
both from the device and from the USB to loopback.
operation. Plug in the external power supply prior to the USB
connector to ensure that proper USB communications are not
interrupted.
Yellow: Modem sending serial/UART data to host.
Green: Modem receiving serial/UART data from host.
Red: Associate.
Connected to DIO lines for user implementation.
Connect to the power board from 3.3 V.
Only used for surface-mount devices.
DS5: ON/SLEEP
DS2: DIO12, the LED illuminates when driven low.
DS3: DIO11, the LED illuminates when driven low.
DS4: DIO4, the LED illuminates when driven low.
Maps to standard through-hole XBee pins.
XBIB-U_DEV reference
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